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Hi, just got an old radiogram and fixed it up so its working again. But, the thing is I have these (attached) bulbs from the power indicator and illumination for the front panel. Now, the odd thing is that they seem to be coated in a metalic-looking substance which is not conductive from the OUTSIDE. It would make sense to coat it from the inside anyway. The substance that coats the tops of them is visually identical to the stuff that coats the tops of the old electronics valves. These bulbs are rated at 6.3v at 0.32A and made by Philips. They are not currently functional, so I cant say wether or not the substance it to change the colour of the light.
Any help her would be appriciated. Thanks
Any help her would be appriciated. Thanks